Discussion
Why is a peak limiter preferred to a clipper in a broadcast audio chain?
Answer: A
A limiter reduces gain smoothly as the peak approaches the limit, so it holds the index below unity without the harmonic generation a hard clipper produces and therefore without splatter into adjacent channels. A clipper achieves the same peak control but at the cost of distortion. Both raise the average depth; that is not the distinguishing point. A monitor is still needed. And nothing makes an index above unity safe in full-carrier AM.
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